摘要:
The invention relates to a light source comprising a light-emitting element, which emits light in a first spectral region, and comprising a luminophore, which comes from the group of alkaline-earth orthosilicates and which absorbs a portion of the light emitted by the light source and emits light in another spectral region. According to the invention, the luminophore is an alkaline-earth orthosilicate, which is activated with bivalent europium and whose composition consists of: (2-x-y)SrO x(Ba, Ca)O (1-a-b-c-d)SiO2 aP2O5 bAl2O3 cB2O3 dGeO2: y Eu2+ and/or (2-x-y)BaO x((Sr, Ca)O (1-a-b-c-d)SiO¿2? aP2O5 bAl2O3 cB2O3 dGeO2: y Eu?2+¿. The desired color (color temperature) can be easily adjusted by using a luminophore of the aforementioned type. The light source can contain an additional luminophore selected from the group of alkaline-earth aluminates, activated with bivalent europium and/or manganese, and/or can contain an additional red-emitting luminophore selected from the group Y(V, P, Si)O¿4?:Eu or can contain alkaline-earth magnesium disilicate.
摘要翻译:光源包括在光谱的蓝色和/或UV区域中发射光的元件; 和由任选用铕激活的碱土金属原硅酸盐制成的发光体,并吸收由光源发射并在另一个光谱区域发射的光的一部分。 碱土原硅酸盐具有以下成分:(2-xy)SrO x(Ba u,Ca v)。(1-abcd)SiO 2 .aP 2 O 5b Al 2 O 3cB 2O 3dGeO 2:yE 2 + = 0-1.6; y = 0.005-0.5; x + y = 1.6; a,b,c,d = 0-0.5; u + v = 1)和/或组成:(2-xy)BaO.x (Sr u,Ca v)(1-abcd)SiO 2.aP 2 O 5bAl 2 O 3cB 2O 3dGeO 2:yEu 2 + +(其中x = 0-1.6; y = 0.005-0.5; a,b,c, d = 0-0.5; u + v = 1; xu为至少0.4)。 a,b,c和d中的至少一个大于0.01。 优选的特征:发光体中的至少一部分硅可被镓取代。 一个或多个LED芯片(1)布置在反射器(4)内的电路板(2)上,并且发光体分散在布置在反射器上方的光板(5)中。
摘要:
The invention relates to a light source comprising a light-emitting element, which emits light in a first spectral region, and comprising a luminophore, which comes from the group of alkaline-earth orthosilicates and which absorbs a portion of the light emitted by the light source and emits light in another spectral region. According to the invention, the luminophore is an alkaline-earth orthosilicate, which is activated with bivalent europium and whose composition consists of: (2-x-y)SrO x(Ba, Ca)O (1-a-b-c-d)SiO2 aP2O5 bAl2O3 cB2O3 dGeO2: y Eu2+ and/or (2-x-y)BaO x((Sr, Ca)O (1-a-b-c-d)SiO¿2? aP2O5 bAl2O3 cB2O3 dGeO2: y Eu?2+¿. The desired color (color temperature) can be easily adjusted by using a luminophore of the aforementioned type. The light source can contain an additional luminophore selected from the group of alkaline-earth aluminates, activated with bivalent europium and/or manganese, and/or can contain an additional red-emitting luminophore selected from the group Y(V, P, Si)O¿4?:Eu or can contain alkaline-earth magnesium disilicate.
摘要翻译:本发明涉及包含发光元件的光源,所述发光元件发射第一光谱区域中的光,并且包含发光体,所述发光体来自所述碱土原硅酸盐的组并且吸收由所述光发射的一部分光 来源并在另一个光谱区域发射光线。 根据本发明,发光材料是碱土原硅酸盐,其用二价铕活化并且其组成包括:(2-xy)SrO x(Ba,Ca)O(1-abcd)SiO 2 aP 2 O 5 bAl 2 O 3 cB 2 O 3 dGeO 2: y Eu2 +和/或(2-xy)BaO x((Sr,Ca)O(1-abcd)SiO 2·aP 2 O 5 bAl 2 O 3 cB 2 O 3 dGeO 2:y Eu 2+ + 通过使用上述类型的发光体进行调节,光源可以含有选自碱土铝酸盐,用二价铕和/或锰活化的另外的发光体,和/或可以含有选自以下的另外的红色发光发光体: 基团Y(V,P,Si)O4:Eu或可以含有碱土金属硅酸盐。
摘要:
The light emitting device has a light emitting diode which is made of a nitride semiconductor and a phosphor which absorbs a part of lights emitted from the light emitting diode and emits different lights with wavelengths other than those of the absorbed lights. The phosphor is made of alkaline earth metal silicate fluorescent material activated with europium.
摘要:
The invention relates to a luminescent material, particularly for use in security documents, comprised of a host lattice made of rare-earth oxysulfide, which is doped with at least two types of ions. The luminescent material exhibits anti-Stokes luminescence according to Stokes' law when it is irradiated with an excitation radiation. According to the invention, the luminescent material contains two luminescent material constituents, which are co-doped with ytterbium/holmium on the one hand and with ytterbium/erbium on the other. The luminescent material can preferably be used for forming security features.
摘要:
The present invention relates to alkaline earth metal silicate luminophores having improved long-term stability and to a corresponding method for improving the long-term stability of alkaline earth metal silicate luminophores. The luminophore according to the invention is a luminophore comprising a base lattice according to the general chemical formula EA x Si y O z , where x, y, z > 0. The component EA is formed by one or more alkaline earth metals. An activator, for example Eu 2+ or Mn 2+ , is doped into the base lattice. The luminophore has the fundamental property to absorb radiation in a first wavelength range and emit radiation in a second wavelength range that is different from the first wavelength range. The luminophore is designed in the form of crystals. According to the invention, the surfaces of the crystals of the luminophore are chemically modified such that at least portions of the surfaces thereof are formed by a chemical compound of the general formula Ea u Z 2 . The component Z is formed by anions, which can be chemically combined with the EA cations of the luminophore. The variable u is equal to an ion charge of the anions Z. The chemical modification is therefore not a coating.
摘要:
The invention relates to a light emitting device (1) having a radiation emitting element, for example a light emitting diode (LED), and a luminescent material (3) which is able to absorb a part of the radiation sent out by the radiation emitting element and to send out light with a wavelength which is different from the wavelength of the absorbed radiation. The device further has diffusing particles (4) which are able to scatter a part of the radiation sent out by the radiation emitting element, and/or to scatter a part of the light sent out by the luminescent material (3). The diffusing particles (4) are of non-activated luminescent material, through which production is simplified.